A non-interpolating sound generator based on the difference equation:
x(n+2) = 1 - a * x(n+1)^2 + b * x(n)
This equation was discovered by French astronomer Michel Hénon while studying the orbits of stars in globular clusters.
sclang code translation:
| freq | 
 Iteration frequency in Hertz  | 
| a | 
 Equation variable  | 
| b | 
 Equation variable  | 
| x0 | 
 Initial value of x  | 
| x1 | 
 Second value of x  | 
| mul | |
| add |